Assign user defined identifier from one table to another table

Hi,

I have two excel file table; a.xlsx and b.xlsx. In a.xlsx file, identifier is assigned for different weight, height and width data column. The another excel file b.xlsx has also weight, height and width column with other data columns. I would like to assigned identifier of table a.xlsx in to table b.xlsx in new column. Any advice is appreciated.

Answer 1

[Siddharth Bhutiya]

You can use outerjoin to do that. Your keys would be the three common variables and since you only want to add the extra identifier variable from a to b, you can specify MergeKeys to be true.

a = readtable('a.xlsx');
b = readtable('b.xlsx');
outerjoin(a,b,'Keys',{'height','weight','width'},'MergeKeys',true)

ans =

  4×7 table

    weight    height    width    identifier    serialNo    age    cost
    ______    ______    _____    __________    ________    ___    ____

     502       101       52           1           1        34     4322
     502       101       53         NaN           4        55     5533
     515       101       53           3           3        43     2344
     515       131       53           2           2        23     5433

[Yen Su]

This works. Is there a way to put serial no in first column, identifier in second column and after that other columns?

[Siddharth Bhutiya]

You can use movevars for that

c = movevars(c,{'serialNo','identifier'},'Before',1)